11021004421 has 4 divisors (see below), whose sum is σ = 12595433632. Its totient is φ = 9446575212.

The previous prime is 11021004419. The next prime is 11021004457. The reversal of 11021004421 is 12440012011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11021004421 - 2¹ = 11021004419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021004395 and 11021004404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021004481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 787214595 + ... + 787214608.

It is an arithmetic number, because the mean of its divisors is an integer number (3148858408).

Almost surely, 2^11021004421 is an apocalyptic number.

It is an amenable number.

11021004421 is a deficient number, since it is larger than the sum of its proper divisors (1574429211).

11021004421 is an equidigital number, since it uses as much as digits as its factorization.

11021004421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574429210.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11021004421 its reverse (12440012011), we get a palindrome (23461016432).

The spelling of 11021004421 in words is "eleven billion, twenty-one million, four thousand, four hundred twenty-one".